Luminescence and energy transfer in Dy3+/Tb3+ co-doped CaO–Al2O3–B2O3–RE2O3 glass

Energy transfer based emission analysis of Dy3+/Eu3+ co-doped ZANP glasses for white LED applications

“…In addition to that the energy transfer phenomena between Dy 3+ and Eu 3+ [27], Tb 3+ and Dy 3+ [28,29] and Eu 2+ and Dy 3+ [30] have also been reported.…”

Eu‐,Tb‐, and Dy‐Doped Oxyfluoride Silicate Glasses for LED Applications

“…The spectrum monitored at 544 nm is comprised of four bands peaking at ~318, 349, 376, and 483 nm, which are attributed to the electronic transitions of Tb 3+ ions from ground state 7 F 6 to excited states 5 H 7 (318 nm), 5 L 9 (349 nm), 5 G 6 (376 nm), and 5 D 4 (483 nm), respectively . In addition, the spectra monitored at 488 and 578 nm mainly have five bands peaking at ~323, 348, 363, and 387 nm, which are assigned to the electronic transitions of Dy 3+ ions from ground state 6 H 15/2 to excited states 4 D 7/2 (323 nm), 6 P 7/2 (348 nm), 6 P 5/2 (363 nm), and 4 M 21/2 (387 nm), respectively. For the spectra monitored at 420 nm, three excitation peaks at 339, 354, and 376 nm are detected.…”

Dy3+/Tb3+-codoped tunable warm light-emitting fluorogermanate glass phosphor

“…The dysprosium to terbium energy-transfer process has already been thoroughly investigated 37 and demonstrated elsewhere by many. [28][29][30] In order to infer the viability of producing warm white-light using other Dy 3þ ∕Tb 3þ -coped fluorogermanate glass phosphor, one has examined the excitation wavelength dependence of the tint of the yellow-reddish light emanating from the dysprosium single-doped samples, as indicated in the graph…”

“…Emission color tunability in several rare-earth doped phosphor materials induced via excitation power, [11][12][13] temperature, 14,15 and adjustment of the active ions' concentration combination has been demonstrated by many. 11,16,17 In the past few years, several reports have been devoted to the search for warm-light emission phosphors using combinations of rare-earth doping including Eu 3þ ∕Tb 3þ , Eu 3þ ∕Dy 3þ , Eu 3þ ∕Ce 3þ , Eu 3þ ∕Er 3þ , Tm 3þ ∕Dy 3þ , Tm 3þ ∕Dy 3þ ∕Sm 3þ , [17][18][19][20][21][22][23][24][25][26][27] and in Tb 3þ ∕Dy 3þ -codoped silicate, 28 28 lead-borate, 29 and zinc-phosphate 30 glasses. Bearing that in mind, the search for alternative materials is demanded and fluorogermanate-based glass upsurges as a viable candidate for application in rare-earth doped based upconverters.…”